Smtp Penetration Testing

Name: Smtp Penetration Testing
Author: sickn33

Listed

sickn33·vlatest·testing·MIT

Simulates SMTP server vulnerabilities to identify misconfigurations and potential email injection risks.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

Run this in your project

terminal

$ npx skills add sickn33/agentic-awesome-skills --skill smtp-penetration-testing -a claude-code

Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

sickn33

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned 28 Sept 2026

This skill failed 1 of 6 checks. A failure is not proof of bad intent; it means something in the code needs a human to look at it before you run it.

Declares what it does: failed
No SKILL.md was found in the skill's directory.
SKILL.md exists, its frontmatter parses, and it declares a name and a description.
No undeclared network calls: passed
Makes no network calls.
Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.
No obfuscated payloads: passed
No encoded or obfuscated payloads.
No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.
No credential access: passed
Reads no keys, tokens, keychains or credential files.
Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.
No pipe-to-shell installers: passed
No pipe-to-shell or download-and-run installers.
No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.
Pinned to a commit: passed
Scanned sickn33/antigravity-awesome-skills at 5a4cdd9df8.
The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit: 5a4cdd9df8
Manifest: skills/smtp-penetration-testing/SKILL.md
Scanned: 0 files
Copies in repo: 3 — all of them scanned

This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.

What each check looks for →

About this skill

What it does

This skill enables AI agents to perform automated SMTP penetration testing, identifying vulnerabilities in email server configurations and protocols. It specifically targets weaknesses such as open relays, unauthenticated relay access, and improper authentication mechanisms to assess security posture.

When to use it

Conducting pre-deployment security audits for new email infrastructure or migration projects.
Validating the effectiveness of existing firewall rules and spam filtering policies against known attack vectors.
Simulating phishing campaign delivery paths to ensure internal systems can detect unauthorized relay attempts.
Performing compliance checks for organizations required to demonstrate robust email security controls.

Key capabilities

Automated scanning of SMTP ports (25, 465, 587) across target IP ranges.
Detection of open relay configurations allowing unauthenticated message forwarding.
Identification of weak or missing authentication protocols like STARTTLS and ESMTP-AUTH.
Reporting on specific vulnerability types including buffer overflows and command injection risks in mail handlers.

Example prompts

"Scan the SMTP server at 192.0.2.1 for open relay vulnerabilities and report findings."
"Test our email gateway against common authentication bypass techniques and list any weak points found."
"Perform a non-intrusive penetration test on port 587 to check for improper TLS implementation."

Tips & gotchas

Ensure you have explicit written authorization before scanning any external IP addresses, as unauthorized SMTP testing is illegal in most jurisdictions. Limit scan intensity during business hours to avoid disrupting legitimate email traffic or triggering false-positive intrusion detection alerts.